Severe lumbar spinal stenosis combined with Guillain-Barré syndrome: A case report

Table 1 The results of nerve conduction examination

Nerve	Conduction	NCV (m/s)		Stimulating points	Record points	Incubation period (ms)		CMAP (mv) or SNAP (μv)
		Left	Right			Left	Right	Left	Right
Median nerve (S)			38.8	Middle finger	Wrist	No	3.3		1.2
Ulnar nerve (S)			33.7	Little finger	Wrist	No	3.0		1.0
Median nerve (M)	Wrist to elbow		25.2		Abductor pollicis brevis	No	5.8		0.6
Ulnar nerve (M)	Wrist to elbow	32.9	33.7		Abductor digiti minimi	3.2	3.6	0.7	0.8
Common peroneal nerve (M)	Ankle to capitula fibula	26.7	17.8		Extensor digitorum brevis	5.1	4.4	0.5	0.3
Superficial peroneal nerve (S)				Middle fibula	Ankle	No	No
Tibial nerve (M)	Malleolus medialis to popliteal space	27.6	28.5		Flexor hallucis brevis	5.2	5.9	0.3	0.4
Sural nerve (S)					Lateral malleolus	No	No

The sensory nerve action potentials of the bilateral superficial peroneal nerve, bilateral sural nerve, left median nerve, and left ulnar nerve were not elicited, the sensory nerve conduction velocity of the right median nerve and ulnar nerve slowed down, and the sensory nerve action potential amplitude decreased. The left median nerve compound motor action potential was not elicited, the right median nerve, bilateral common peroneal nerve, bilateral ulnar nerve, bilateral tibial nerve motor nerve conduction velocity slowed down, and compound motor action potential amplitude decreased, with a discrete waveform. These findings demonstrated multiple peripheral nerve damage. S: Sensory; M: Motor; NCV: Nerve conduction examination; CMAP: Compound motor action potential; SNAP: Sensory nerve action potential.